An early taxonomic system,
the de Candolle system was originally published in :

and followed up by the very extensive Prodromus

Prodromus Systematis Naturalis Regni Vegetabilis

Prodromus Systematis Naturalis Regni Vegetabilis, also known by its standard botanical abbreviation Prodr. , is a 17-volume treatise on botany initiated by A. P. de Candolle. De Candolle intended it as a summary of all known seed plants, encompassing taxonomy, ecology, evolution and biogeography....

:

(available online at Gallica)

The system recognises the following groups of vascular plants:

• classis I. DICOTYLEDONEÆ

  subclassis 1. THALAMIFLORÆ

  subclassis 2. CALYCIFLORÆ

  subclassis 3. COROLLIFLORÆ

  subclassis 4. MONOCHLAMYDEÆ

• classis II. MONOCOTYLEDONEÆ

----

List of families in the Prodromus, arranged according to this de Candolle system. Note that this system was published well before there were internationally accepted rules for botanical nomenclature

Botanical nomenclature

Botanical nomenclature is the formal, scientific naming of plants. It is related to, but distinct from taxonomy. Plant taxonomy is concerned with grouping and classifying plants; botanical nomenclature then provides names for the results of this process. The starting point for modern botanical...

. Here, a family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 is indicated as "ordo". Terminations for families are not what they are now. Neither of these phenomena is a problem from a nomenclatural perspective: the ICBN provides for this.

Within the dicotyledons ("classis prima DICOTYLEDONEÆ") the system recognises:

• subclassis I. THALAMIFLORÆ

  ordo I. RANUNCULACEÆ

  ordo II. DILLENIACEÆ

  ordo III. MAGNOLIACEÆ

  ordo IV. ANONACEÆ [sic]

  ordo V. MENISPERMACEÆ

  ordo VI. BERBERIDEÆ

  ordo VII. PODOPHYLLACEÆ

  ordo VIII. NYMPHÆACEÆ

  ordo VIIIbis. SARRACENIACEÆ

  ordo IX. PAPAVERACEÆ

  ordo X. FUMARIACEÆ

  ordo XIbis. RESEDACEÆ

  ordo XI. CRUCIFERÆ

  ordo XII. CAPPARIDEÆ

  ordo XIII. FLACOURTIANEÆ

  ordo XIV. BIXINEÆ

  ordo XIVbis. LACISTEMACEÆ

  ordo XV. CISTINEÆ

  ordo XVI. VIOLARIEÆ

  ordo XVII. DROSERACEÆ

  ordo XVIII. POLYGALACEÆ

  ordo XIX. TREMANDREÆ

  ordo XX. PITTOSPOREÆ

  ordo XXI. FRANKENIACEÆ

  ordo XXII. CARYOPHYLLEÆ

  ordo XXIII. LINEÆ

  ordo XXIV. MALVACEÆ

  ordo XXV. BOMBACEÆ [sic]

  ordo XXVI. BYTTNERIACEÆ

  ordo XXVII. TILIACEÆ

  ordo XXVIII. ELÆOCARPEÆ

  ordo XXIX. CHLENACEÆ

  ordo XXIXbis. ANCISTROCLADEÆ

  ordo XXIXter. DIPTEROCARPEÆ

  ordo XXIXter.[sic] LOPHIRACEÆ

  ordo XXX. TERNSTROEMIACEÆ

  ordo XXXI. CAMELLIEÆ

  ordo XXXII. OLACINEÆ

  ordo XXXIII. AURANTIACEÆ

  ordo XXXIV. HYPERICINEÆ

  ordo XXXV. GUTTIFERÆ

  ordo XXXVI. MARCGRAVIACEÆ

  ordo XXXVII. HIPPOCRATEACEÆ

  ordo XXXVIII. ERYTHROXYLEÆ

  ordo XXXIX. MALPIGHIACEÆ

  ordo XL. ACERINEÆ

  ordo XLI. HIPPOCASTANEÆ

  ordo XLII. RHIZOBOLEÆ

  ordo XLIII. SAPINDACEÆ

  ordo XLIV. MELIACEÆ

  ordo XLV. AMPELIDEÆ

  ordo XLVI. GERANIACEÆ

  ordo XLVII. TROPÆOLEÆ

  ordo XLVIII. BALSAMINEÆ

  ordo XLIX. OXALIDEÆ

  ordo L. ZYGOPHYLLEÆ

  ordo LI. RUTACEÆ

  ordo LII. SIMARUBEÆ [sic]

  ordo LIII. OCHNACEÆ

  ordo LIV. CORIARIEÆ

• subclassis II. CALYCIFLORÆ

  ordo LV. CELASTRINEÆ

  ordo LVI. RHAMNEÆ

  ordo LVII. BRUNIACEÆ

  ordo LVIII. SAMYDEÆ

  ordo LIX. HOMALINEÆ

  ordo LX. CHAILLETIACEÆ

  ordo LXI. AQUILARINEÆ

  ordo LXII. TEREBINTHACEÆ

  ordo LXIII. LEGUMINOSÆ

  ordo LXIV. ROSACEÆ

  ordo LXV. CALYCANTHEÆ

  ordo LXVbis. MONIMIACEÆ

  ordo LXVI. GRANATEÆ

  ordo LXVII. MEMECYLEÆ

  ordo LXVIII. COMBRETACEÆ

  ordo LXIX. VOCHYSIEÆ

  ordo LXX RHIZOPHOREÆ

  ordo LXXI. ONAGRARIEÆ

  ordo LXXII. HALORAGEÆ

  ordo LXXIII. CERATOPHYLLEÆ

  ordo LXXIV. LYTHRARIEÆ

  ordo LXXIVbis. CRYPTERONIACEÆ

  ordo LXXV. TAMARISCINEÆ

  ordo LXXVI. MELASTOMACEÆ

  ordo LXXVII. ALANGIEÆ

  ordo LXXVIII. PHILADELPEÆ

  ordo LXXIX. MYRTACEÆ

  ordo LXXX. CUCURBITACEÆ

  ordo LXXXI. PASSIFLOREÆ

  ordo LXXXII. LOASEÆ

  ordo LXXXIII. TURNERACEÆ

  ordo LXXXIV. FOUQUIERACEÆ

  ordo LXXXV. PORTULACEÆ

  ordo LXXXVI. PARONYCHIEÆ

  ordo LXXXVII. CRASSULACEÆ

  ordo LXXXVIII. FICOIDEÆ

  ordo LXXXIX. CACTEÆ

  ordo XC. GROSSULARIEÆ

  ordo XCI. SAXIFRAGACEÆ

  ordo XCII. UMBELLIFERÆ

  ordo XCIII. ARALIACEÆ

  ordo XCIV. HAMAMELIDEÆ

  ordo XCV. CORNEÆ

  ordo XCVbis. HELWINGIACEÆ

  ordo XCVI. LORANTHACEÆ

  ordo XCVII. CAPRIFOLIACEÆ

  ordo XCVIII. RUBIACEÆ

  ordo XCIX. VALERIANEÆ

  ordo C. DIPSACEÆ

  ordo CI. CALYCEREÆ

  ordo CII. COMPOSITÆ

  ordo CIII. STYLIDIEÆ

  ordo CIV. LOBELIACEÆ

  ordo CV. CAMPANULACEÆ

  ordo CVI. CYPHIACEÆ

  ordo CVII. GOODENOVIEÆ

  ordo CVIII. ROUSSÆACEÆ

  ordo CIX. GESNERIACEÆ

  ordo CX. SPHENOCLEACEÆ

  ordo CXI. COLUMELLIACEÆ

  ordo CXII. NAPOLEONEÆ

  ordo CXIII. VACCINIEÆ

  ordo CXIV. ERICACEÆ

  ordo CXV. EPACRIDEÆ

  ordo CXVI. PYROLACEÆ

  ordo CXVII. FRANCOACEÆ

  ordo CXVIII. MONOTROPEÆ

• subclassis III. COROLLIFLORÆ

  ordo CXIX. LENTIBULARIEÆ

  ordo CXX. PRIMULACEÆ

  ordo CXXI. MYRSINEACEÆ

  ordo CXXII. ÆGICERACEÆ

  ordo CXXIII. THEOPHRASTACEÆ

  ordo CXXIV. SAPOTACEÆ

  ordo CXXV. EBENACEÆ

  ordo CXXVI. STYRACACEÆ

  ordo CXXVII. OLEACEÆ

  ordo CXXVIIbis. SALVADORACEÆ

  ordo CXXVIII. JASMINEÆ

  ordo CXXIX. APOCYNACEÆ

  ordo CXXX. ASCLEPIADEÆ

  ordo CXXX[a?] LEONIACEÆ

  ordo CXXXI. LOGANIACEÆ

  ordo CXXXII. GENTIANACEÆ

  ordo CXXXIII. BIGNONIACEÆ

  ordo CXXXIV. SESAMEÆ

  ordo CXXXV. CYRTANDRACEÆ

  ordo CXXXVI. HYDROPHYLLACEÆ

  ordo CXXXVII. POLEMONIACEÆ

  ordo CXXXVII. [sic] CONVOLVULACEÆ

  ordo CXXXVIII. ERICYBEÆ

  ordo CXXXIX. BORRAGINEÆ [sic]

  ordo CXL. HYDROLEACEÆ

  ordo CXLII. SCROPHULARIACEÆ

  ordo CXLII(I).[sic] SOLANACEÆ

  ordo CXLIV. OROBRANCHACEÆ

  ordo CXLV. ACANTHACEÆ

  ordo CXLVI. PHRYMACEÆ

  ordo CXLVII VERBENACEÆ

  ordo CXLVIII MYOPORACEÆ

  ordo CXLIX SELAGINACEÆ

  ordo CL. LABIATÆ

  ordo CLI. STILBACEÆ

  ordo CLII. GLOBULARIACEÆ

  ordo CLIII. BRUNONIACEÆ

  ordo CLIV. PLUMBAGINEÆ

  ordo CLV.[?] PLANTAGINACEÆ

• subclassis 4 MONOCHLAMYDEÆ

  ordo CLVI. PHYTOLACCACEÆ

  ordo CLVII. SALSOLACEÆ

  ordo CLVIII. BASELLACEÆ

  ordo CLIX. AMARANTACEÆ [sic]

  ordo CLX. NYCTAGINACEÆ

  ordo CLXI. POLYGONACEÆ

  ordo CLXII. LAURACEÆ

  ordo CLXIII. MYRISTICACEÆ

  ordo CLXIV. PROTEACEÆ

  ordo CLXV. PENÆACEÆ

  ordo CLXVI. GEISSOLOMACEÆ

  ordo CLXVII. THYMELÆACEÆ

  ordo CLXVIII. ELÆAGNACEÆ

  ordo CLXIX. GRUBBIACEÆ

  ordo CLXX. SANTALACEÆ

  ordo CLXXI. HERNANDIACEÆ

  ordo CLXXII. BEGONIACEÆ

  ordo CLXXIII. DATISCACEÆ

  ordo CLXXIV. PAPAYACEÆ

  ordo CLXXV. ARISTOLOCHIACEÆ

  ordo CLXXVbis. NEPENTHACEÆ

  ordo CLXXVI. STACKHOUSIACEÆ

  [sic]

  ordo CLXXVIII. EUPHORBIACEÆ

  ordo CLXXIX. DAPHNIPHYLLACEÆ

  ordo CLXXX. BUXACEÆ

  ordo CLXXXbis. BATIDACEÆ

  ordo CLXXXI. EMPETRACEÆ

  ordo CLXXXII. CANNABINEÆ

  ordo CLXXXIII. ULMACEÆ

  ordo CLXXXIIIbis. MORACEÆ

  ordo CLXXXIV. ARTOCARPEÆ

  ordo CLXXXV. URTICACEÆ

  ordo CLXXXVI. PIPERACEÆ

  [sic]

  ordo CLXXXVIII. CHLORANTHACEÆ

  ordo CLXXXIX. GARRYACEÆ

  ordo CXC. CUPULIFERÆ

  ordo CXCI. CORYLACEÆ

  ordo CXCII. JUGLANDEÆ

  ordo CXCIII. MYRICACEÆ

  ordo CXCIV. PLATANACEÆ

  ordo CXCV. BETULACEÆ

  ordo CXCVI. SALICINEÆ

  ordo CXCVII CASUARINEÆ

Somewhat inconsistently the Prodromus also treats:

• GYMNOSPERMÆ

  ordo CXCVIII. GNETACEÆ

  ordo CXCIX. CONIFERÆ

  ordo CC. CYCADACEÆ

• incertæ sedis

  ordo (dubiæ affin.) LENNOACEÆ

  ordo (affin. dubiæ) PODOSTEMACEÆ

  ordo num.? CYTINACEÆ

  ordo incertae sedis BALANOPHORACEÆ